Global Patent Index - EP 1055898 A2

EP 1055898 A2 2000-11-29 - Heat exchanger made of aluminium alloy

Title (en)

Heat exchanger made of aluminium alloy

Title (de)

Aluminiumlegierung-Wärmetauscher

Title (fr)

Echangeur de chaleur en alliage d'aluminium

Publication

EP 1055898 A2 (EN)

Application

EP 00110962 A

Priority

  • JP 14924299 A
  • JP 2000009956 A

Abstract (en)

A manufacturing method for an evaporator (1) made of aluminum alloy. First, a three-layer aluminum alloy plate having a core (21) made of Al-Mn alloy, a sacrifice anode layer (22) made of aluminum alloy which is electro-chemically base with respect to the core (21) and clad on one side of the core (21), and a brazing layer (23) made of Al-Si alloy and clad on the other side of the core (21) is uniformly rolled to be work-hardened. Next, the thin work-hardened aluminum alloy plate (20) is bent to form a tube (2) so that the sacrifice anode layer (22) is disposed outside the tube (2) to face air and the brazing layer (23) is disposed inside the tube (2) to face refrigerant. Then, plural tubes (2) and outer fins (4) are alternately laminated and are integrally brazed to tanks (5-7) to form the evaporator (1). As a result, a thickness of the tube (2) is reduced without deteriorating corrosion resistance of the tube (2), thereby decreasing a weight and a size of the evaporator (1). <IMAGE>

IPC 1-7 (main, further and additional classification)

F28F 21/08; F28D 1/03; F28F 1/12; F28F 19/06

IPC 8 full level (invention and additional information)

B23K 1/00 (2006.01); F28D 1/03 (2006.01); F28F 1/32 (2006.01); F28F 3/02 (2006.01); F28F 19/00 (2006.01); F28F 19/06 (2006.01); F28F 21/08 (2006.01)

CPC (invention and additional information)

F28F 19/06 (2013.01); B23K 1/0012 (2013.01); F28D 1/0391 (2013.01); F28F 3/025 (2013.01); F28F 19/004 (2013.01); F28F 21/084 (2013.01); F28F 21/089 (2013.01); B23K 2201/14 (2013.01); Y10T 29/4935 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1055898 A2 20001129; JP 2001050690 A 20010223; US 2002078566 A1 20020627

INPADOC legal status


2005-06-15 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20041201

2000-11-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-11-29 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI